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Covariance of DEI scores in 12 neurobehavioral domains with age at the time of study. For all domains, subjects with FOXG1 disorder showed no significant covariance with age, suggesting that maximal disability did not increase over the lifespan. Among subjects with MECP2 disorder, there was significant positive covariance between age and awareness of self and environment and significant negative covariance between age and mood disorders.
